#include<stdio.h>
#define SEC_PER_YEAR 3.156e7
int main()
{
	float years,Second;
	printf("enter how many years old you are: ");
	scanf_s("%f", &years);
	Second = years * SEC_PER_YEAR;
	printf("you are %1.f years old.\n",years);
	printf("and you are %e seconds old", Second);
	return 0;

}